Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:

Millions of dollars	September 30, 2017		December 31, 2016
Finished products and parts	$	1,565	$	1,388
Raw materials and supplies	720		778
Work in process	159		109
Total	$	2,444	$	2,275